Air-heater for oil-furnaces.



B. F. PAIST. MR HEATER FOR OlL FURNACES.

Patented May 16, 1916.

2 SHEETS-SHEET] APPLlCATlDN FILED OCT. 1. 1914.

B. F. PAIST. AIR HEATER FOR OIL FURNACES.

m 16, 1916. EET$'-$HEE T 2.

APPLICATION FI LED OCT. I. 1914.

Patented run s'rarus PATENT OFFICE.

BENJAMIN r. PAIST, or PirILADELPH A, rENNs LvA IA.

AIR-HEATER ron OIL-FURNACES.

Specification of Letters Patent.

Patented May 16, 1916.

Application filed October 1, 1914. Serial No. 864,500.

T 0 all whom it may concern Be it known that I, BENJAMiN F. Farm, a citizen of the United-States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in 'Air-Heaters for Oil-Furnaces, of which the following is a specification.

One object of my invention is to provide means for heating the air of an oil furnace so that the mixture of oil and air will more readily ignite when it enters the furnace.

A further object of the invention is to utilize the air heating apparatus as a de-, flector for protecting the workmen from the heat of the furnace.

A still further object of the invention is to make the apparatus adjustable so that it can be arranged at any angle desired.

Another object of the invention is to corn struct the air heating apparatus so that the air will pass through it in a comparatively thin filn In the accompanying drawings :Figu re 1, is a perspective view of adouble furnace having the deflecting air cooling devices 10- cated on both sides of the furnace; Fig. 2,

i is a transverse sectional view of the furnace at is the top of the furnace and 5, 5 are the supporting pedestals, in the present instance. v c

The shape of the furnacemay be modified without departing from the essential features of the invent-ion.

6 is the burner.

7 is the air pipe connected to the burner and 8 is the oil pipe extending into the rear end of the burner 6 and arranged so that air and oil are supplied to theburner, preferably under pressure. The air pipe 7 is connected to the pipe which extends into an air heating deflector 9 having trunnions 10, which are mounted in brackets 11, in the present instance secured to the body of the furnace. This deflector is made flat and wide and the metal, in the present instance,

is comparatively thin cast iron, so that the flame from the furnace will quickly heat the air to a higher degree than heretofore as it passes throughthe deflector in a comparatively thin film.

The bearings are preferably located. at each end of the furnace and the deflector extends the full length of the opening 3 of the furnace. At the opposite side of the furnace, as stated above, is another opening 3, as this furnace is a double furnace,

. and mounted in bearings 11 in front of this opening is a deflector 9*, similar to the de flector 9. A pipe 12 extends from one end of the deflector 9 to oneend of the deflector 9. 13 is a pipe coupled to the opposite end of the deflector 9 so that the air passes through the pipe13, through the deflector 9 through the pipe 12, and then through the deflector 9 to the burner, and. during its passage the temperature of the air is con .siderably increased as the. defiector is heated by the flameat the furnace openings.

In the present instance, the oil is also brought to a certaindegree of heat by being passed through a pipe 14, which extends through the deflectors 9? and 9, and through the pipe 12, and,in order to have the valve within easy access, it extends through the coupling of the pipe 7 at 14 and in this pipe is a valve15 which regulates the flow of oil to the burner at .8. Thus both the air and the oil are heated to a certain degree before being projected into the furnace.

By pivoting the deflectors 9 and 9 the furnace man can turn the deflectors so as to be protected from the direct heat of the furnace, consequently he can work closer to the furnace than if there were no protectors.

Furthermore, when one side 'of the deflector is overheated by the continuous action of the flame, it can be turned so as to present.

the other side to the direct action of the flame.

In Fig. 4:, have shown a furnace of a I larger capacity than that shown in Fig. 1, and it has a single opening 3 at one side of the heating chamber 2 and a sliding door 1.6 is; provided which is connected by'barsf'? instance, is attached to an extension 22, which projects overthe top of the furnace. The deflector 9 has lateral extensions 23, which are supported on brackets 24 projecting from the furnace, and is connected at one orboth ends to air pipes 25 leading from a source of air supply. The extension 22 terminates in a central passage 26 and is connected to a longitudinal pipe 27 which, in turn, is connected to the burner 6 and the oil pipe 14 in this instance extends only through the pipe 27 and has an outside connection 14: having a valve and is connected directly to the oil pipe 8 of the burner. While the deflecting sections 9 and 22 may be made in one piece, I preferably make them in two sections, each having a flange and the two flanges are secured together by a row of bolts 28, so that, when it is desired to remove the section 9 for any reason, it can be detached from the section 22 and from its bearings. The section 22 is carried by a support 30 and in the section 22 are passages 31 for the rods 17 of the door op erating mechanism. The deflector in a furnace of this type will burn out in time, and my deflector is so constructed that the section .9 can be detached and can be turned in order to bring the portion, which was previously in front of the opening of the furnace, on theupper side and clear of the direct action of'the flame. In this instance, as well as in the construction illustrated in Fig. 1, the deflectors are comparatively thin so as to cause the air to pass through the deflectors in a thin film.

In some instances, a steam or air spray pipe 29 may be located below the furnace opening, as indicated in Figs. 1 and 2, so as to spray small jets of steam or air in front,

of the furnace opening to deflect the flame, if found desirable, but this may be omitted in some instances. 7

I claim 1. The combination in a furnace, of a burner; an air pipe for supplying air to the burner; a deflector in front of the furnace opening and connected to the air pipe, said deflector being made flat and comparatively wide so as to provide an internal chamber through which a thin film of air will pass, the walls of the deflector being comparatively thin so that the air passing through the deflector; will be heated from the furnace in its passage to the burner.

2. The combination in a furnace, of a pipe for supplying air to the furnace; and a pivoted deflector mounted in front of the furnace opening and made hollow and coupled to the air supply pipe so that it not only acts as a deflector but also acts as a means for heating the air prior to its entering the furnace.

3. The combination of a furnace having an opening; a hollow deflector in front of the opening; a burner; and an air pipe communicating with the burner and with the interior of the deflector, the deflector being reversible so that either side can be presented to the direct action of the heat of the furnace. I

4:. The combination of a furnace having a longitudinal opening at one side thereof; bearings mounted on the furnace at one side of the opening; a hollow, flat deflector mounted in the bearings and of suflicient width to deflect the direct rays of heat from the workmen, said deflector extending diagonally upward toward the furnace; an air pipe communicating with the source of air supply and with one end of the deflector; and a burner for the furnace having a pipe connected to the opposite side of the deflector so that the air traveling through the deflector will be heated in its passage.

5. The combination of a furnace having a longitudinal opening at one side; a hollow deflector mounted in front of the opening; a burner having an air and an oil pipe, the air pipe being connected with one end of the deflector; and an oil pipe extending through the deflector and connected to the oil pipe of the burner so that both the air and the oil are heated as they pass to the burner,

6. The combination of a furnace having an opening at one side; a deflector located in front of the opening and made hollow for the passage of air; an air pipe connected with one end of the deflector; an air pipe connected with the other end of the deflector; a burner having a pipe with which the latter pipe is connected; an oil pipe ex tending through the said last mentioned pipe and connected to the oil pipe of the burner; and a regulating valve in said oil pipe.

In testimony whereof, I have slgned my name to this specification, in the presence of two subscribing witnesses.

BENJAMIN F. PAIST. Witnesses:

Jos. H. KLEIN, WM. A. BARR.

copies or this patent may be obtained for five cents each, by addressing the Commissioner of Patents, I Washington, D. G." 

